We report a notch-shaped coplanar microwave waveguide antenna on a glass plate designed for on-chip detection of optically detected magnetic resonance (ODMR) of fluorescent nanodiamonds (NDs). A lithographically patterned thin wire at the center of the notch area in the coplanar waveguide realizes a millimeter-scale ODMR detection area (1.5 x 2.0 mm^2) and gigahertz-broadband characteristics with low reflection (about 8%). The ODMR signal intensity in the detection area is quantitatively predictable by numerical simulation. Using this chip device, we demonstrate a uniform ODMR signal intensity over the detection area for cells, tissue, and worms. The present demonstration of a chip-based microwave architecture will enable scalable chip integration of ODMR-based quantum sensing technology into various bioassay platforms.
@article{arxiv.2205.02970,
title = {Glass-patternable notch-shaped microwave architecture for on-chip spin detection in biological samples},
author = {Keisuke Oshimi and Yushi Nishimura and Tsutomu Matsubara and Masuaki Tanaka and Eiji Shikoh and Li Zhao and Yajuan Zou and Naoki Komatsu and Yuta Ikado and Yuka Takezawa and Eriko Kage-Nakadai and Yumi Izutsu and Katsutoshi Yoshizato and Saho Morita and Masato Tokunaga and Hiroshi Yukawa and Yoshinobu Baba and Yoshio Teki and Masazumi Fujiwara},
journal= {arXiv preprint arXiv:2205.02970},
year = {2022}
}